선박용 SCR 시스템에서 스월형 혼합기의 날개 각도가 유동혼합 및 압력강하에 미치는 영향
Effect of Vane Angle of Swirl Type Mixer on Flow Mixing and Pressure Drop in Marine Selective Catalytic Reduction Systems
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
선박용 질소산화물 저감장치의 혼합영역에서 유동혼합 성능을 개선하기 위해 스월형 혼합기가 개발되었다. 본 연구에서는 스월형 혼합기와 각단의 날개 각도가 조절 가능한 다단 스월형 혼합기가 고려되었다. 두 스월형 혼합기의 최적 날개 각도를 도출하기 위해 날개 각도가 균일지수 및 압력강하에 미치는 영향을 수치해석 기법을 이용하여 조사하였다. 스월형 혼합기에서는 혼합기의 날개 각도를 10° 에서 80° 까지 변화시킬 때, 최적의 유동혼합 성능은 베인 각도 30° 에서 60° 범위에서 나타났으나, 압력강하는 베인 각도 증가에 따라 선형적으로 증가하였다. 반면 다단 스월형 혼합기에서는 각 단의 날개각도를 조절함으로써 압력강하를 낮추면서도 높은 혼합성능의 유지가 가능함을 보였다.
Abstract
A swirl type mixer was developed to improve the flow mixing performance of a marine selective catalytic reduction system. In this study, the swirl type mixer and a multi-staged swirl type mixer, in which the angle of the vanes at each stage is controllable were considered to provide the optimal region of angles for the mixers. The effects of the vane angles in both mixers on the uniformity index and pressure drop were investigated using a computational fluid dynamics simulation. In the swirl type mixer, the optimal conditions for the flow mixing performance were observed at vane angles from 30 to 60 degrees when vane angles could be adjusted between 10 to 80 degrees, however, the pressure drop increased continually with increasing vane angle of the mixer. On the other hand, control of the individual staged angles of the multi-staged mixer showed that it is possible to keep enhancing flow mixing performance while reducing the pressure drop.
참고문헌 (13)
- E. K. Lee, "Impacts and measures of SOx and NOx emission standards on shipping", Shipping and Management, 22, pp.22~38 (2011)
- "Revised MARPOL Annex VI, Regulations for the Prevention of Air Pollution from Ships and NOx Technical Code 2008", International Maritime Organization, ~ (2009)
- 강국진, "국내 선박 엔진의 Nox 배출현황 및 저감기술 개발에 관한 고찰", 한국해양환경•에너지학회지, 7(2), pp.57~63 (2004), 한국해양환경·에너지학회
- S. Kim, "The need to develop nitrogen oxides(NOx) reduction equipment and regulation in marine", Proceedings of the 44th KOSCO SYMPOSIUM Spring Conference, pp.69~74 (2012)
- S. M. Palash, "State of the art of NOx mitigation technologies and their effect on the performance and emission characteristics of biodiesel-fueled compression ignition engine", Energy Conversion and Management, 76, pp.400~420 (2013)
- D. F. Woodyard, "Pounder’s Marine Diesel Engines and Gas Turbines", pp.2009, Elsevier
- H. Ha, "DeNOx Performance of Zeolite-type Supported Catalysts for Marine NH3-SCR Applications, M.S. Dissertation, Department of Chemical Engineering", M.S., Department of Chemical Engineering, pp.2011
- 김태경, "선박용 SCR 시스템에서 혼합기 구조에 따른 난류유동과 우레아 수용액의 혼합특성", 한국마린엔지니어링학회지, 36(6), pp.814~822 (2012), 한국마린엔지니어링학회[DOI]
- 박태화, "Effect of static mixer geometry on flow mixing and pressure drop in marine SCR applications", International Journal of Naval Architecture and Ocean Engineering, 6(1), pp.27~38 (2014), 대한조선학회
- C. Choi, "Numerical analysis of urea decomposition with static mixers in marine SCR system", Journal of Clean Energy Technologies, 3(1), pp.39~42 (2015)
- G. M. Choi, "Mixer for fluid mixing in the pipe", Korea, Patent 10-1340889, ~ (2013)
- Fluent 6.3 User’s Guide, "Fluent", ANSYS Inc, ~ (2007)
- Optimization of catalytic converter gas flow distribution by CFD prediction, "H. Weltens", SAE, ~, pp.SAE Technical Paper, 930780 (1993)